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Table 7 Number of failures according to tooth type in the maxilla for the .016″ × .022″ braided SS retainers bonded to 4 incisors (82 patients, 328 bonded sites)

From: Survival of maxillary and mandibular bonded retainers 10 to 15 years after orthodontic treatment: a retrospective observational study

Number of failures (%) 12 (%) 11 (%) 21 (%) 22 (%) Total (%)
0 (no failures) 66 (80.5%) 72 (87.9%) 71 (86.6%) 74 (90.2%) 283 (86.3%)
1 14 (17.1%) 7 (8.5%) 8 (9.8%) 7 (8.5%) 36 (11.0%)
2 1 (1.2%) 2 (2.4%) 2 (2.4%) 0 (0%) 5 (1.5%)
3 0 (0%) 1 (1.2%) 1 (1.2%) 1 (1.2%) 3 (0.9%)
4 1 (1.2%) 0 (0%) 0 (0%) 0 (0%) 1 (0.3%)
Total number of failures (%) 16 (19.5%) 10 (12.1%) 11 (13.4%) 8 (9.8%) 45 (13.7%)